Please help!! I just started college

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asked Apr 4, 2021 107k views

1 vote

Please help!! I just started college

Mathematics
college

Frank Bannister asked

by Frank Bannister

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1 Answer

7 votes

Answer:

(r. q) (7) =
$\pm 220$

(q.r) (7) =
$\pm 220$

Explanation:

$q(x) = {x}^(2) + 6 \\ q(7) = {7}^(2) + 6 = 49 + 6 = 55\\ r(x) = √(x + 9) \\ r(7) = √(7 + 9) = √(16) = \pm 4 \\ \\ (r.q)(7) = r(7).q(7) = \pm 4 * 55 = \pm220 \\ \\ (q.r)(7) = q(7).r(7) = 55 * \pm 4 = \pm220$

Mike Li answered Apr 8, 2021

by Mike Li

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